21205144

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{1009}}^1$

素因数の和:1123

約数の個数: 32

約数和(自身を含む): 41450400

約数和(自身を除く): 20245256

約数列:

[1, 2, 4, 8, 37, 71, 74, 142, 148, 284, 296, 568, 1009, 2018, 2627, 4036, 5254, 8072, 10508, 21016, 37333, 71639, 74666, 143278, 149332, 286556, 298664, 573112, 2650643, 5301286, 10602572, 21205144]

約数ペア:

[(1, 21205144), (2, 10602572), (4, 5301286), (8, 2650643), (37, 573112), (71, 298664), (74, 286556), (142, 149332), (148, 143278), (284, 74666), (296, 71639), (568, 37333), (1009, 21016), (2018, 10508), (2627, 8072), (4036, 5254)]